[c-nsp] Filtering telnet without ACL

Joost greene joost.greene at gmail.com
Mon Aug 11 04:13:38 EDT 2008


Hi Saku,

I forgot to mention that the question said to limit telnet access to
loopback of two routers without using Access lists so i can see your answer
makes sense but what do you mean by MPLS LSR ?

Thanks,
Joost

On Fri, Aug 1, 2008 at 5:04 PM, Saku Ytti
<saku+cisco-nsp at ytti.fi<saku%2Bcisco-nsp at ytti.fi>
> wrote:

> On (2008-08-01 15:14 +0200), Joost greene wrote:
>
> Hey,
>
> > Someone challenged me with a question on how i can filter telnet access
> to
> > one router from all hosts except two of them WITHOUT using access-lists
> or
> > access-line under the VTY? any ideas?
>
>  I assume challenge was set, because asker knows how to do it. If not,
> then I think challenge should be, how to make router output PONIES.
>  Anyhow, I think CoPP, rACL and policy-route would break the
> 'no acl' definition and wouldn't be acceptable solution.
>
>  I think what would fit the rule, is MPLS LSR where you'd only
> have route back to couple management hosts and others couldn't
> telnet to the box, simply because box doesn't have route to them.
>  Of course everyone in your IGP could telnet to the box also.
>
> --
>   ++ytti
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